当前路径：Functions/File_Opreations.cs
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace Function
{
   public class File_Opreations
    {
        #region
        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="FileToZip">要进行压缩的文件名</param>
        /// <param name="ZipedFile">压缩后生成的压缩文件名</param>
       public static bool Download_Logfile(List<string> Filelist, string ZipedFile, string filepath)
        {
            bool res = true;
            FileStream ZipFile = null;
            ZipOutputStream ZipStream = null;
            ZipEntry ZipEntry = null;
            //string filepath = @"..\..\log\";
            string suffix = ".txt";
           string filepatch = "";
            ZipFile = File.Create(filepath + ZipedFile);
            try
            {
                foreach (string FileToZip in Filelist)
                {

                    filepatch = filepath + FileToZip + suffix;
                    ZipFile = File.OpenRead(filepatch);
                    byte[] buffer = new byte[ZipFile.Length];
                    ZipFile.Read(buffer, 0, buffer.Length);
                    // ZipFile.Close();
                    ZipStream = new ZipOutputStream(ZipFile);
                    // ZipEntry = new ZipEntry(FileToZip);
                    ZipEntry = new ZipEntry(FileToZip + suffix);

                    ZipStream.PutNextEntry(ZipEntry);
                    //ZipStream.SetLevel(level);
                    ZipStream.Write(buffer, 0, buffer.Length);
                }
                if (ZipEntry != null)
                {
                    ZipEntry = null;
                }
                if (ZipStream != null)
                {
                    ZipStream.Finish();
                    ZipStream.Close();
                }
                if (ZipFile != null)
                {
                    ZipFile.Close();
       ...